I was going to use their bottom metal until I researched the company and customer service sucks with quality issues, their actions are not cheap if they need to be trued up and for what they sell their trued and blue printed actions I would get a name brand over ptg.
Talk to your smith but to get their action trued you'll be paying for it and cost will probably not end up much less overall.  Just have to decide, spend more on the action or the gun smithing but in the end you'll be spending the same.
I asked this question to a few different smiths and they all said the same thing I typed above.